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inverted result for checkchar, saving some bytes and cycles

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This commit is contained in:
mrdudz 2015-10-12 19:03:50 +02:00
parent 4557e8d004
commit bf3ea5328f
1 changed files with 7 additions and 6 deletions
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13
libsrc/c64/soft80_cputc.s
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@ -389,7 +389,7 @@ remcolor:
; => only one char in cell used
jsr soft80_checkchar
bcc @sk1 ; space at current position
bcs @sk1 ; space at current position
; vram (textcolor) = bgcolor
lda (CRAM_PTR),y ; vram
@ -447,7 +447,7 @@ soft80_putcolor:
@l2s:
; one character in cell is already used
jsr soft80_checkchar
bcs @sk1 ; char at current position => overwrite 1st
bcc @sk1 ; char at current position => overwrite 1st
lda soft80_internal_cursorxlsb
beq @sk3 ; jump if even xpos
@ -476,7 +476,8 @@ soft80_putcolor:
;
; in: x = $34
; y must be $00
; out: CLC: space SEC: character
; out: SEC: space
; CLC: character
; x = $34
; y = $00
soft80_checkchar:
@ -501,11 +502,11 @@ soft80_checkchar:
.endif
.endrepeat
;ldy #$00 ; is 0
clc
;sec ; is set
rts
@ischar:
ldy #$00
sec
;clc ; is cleared
rts
@l1a:
ldy #$07
@ -519,6 +520,6 @@ soft80_checkchar:
.endif
.endrepeat
;ldy #$00 ; is 0
clc
;sec ; is set
rts
.endif